<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
        <!-- 开发环境版本，包含了有帮助的命令行警告 -->
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <!-- 模板内容 -->
    <!-- 遍历操作1.对象的遍历  2.数组的遍历
        vue.js的循环渲染是依赖于v-for指令的
    -->
    <div id="demo">
       <ul>
           <li v-for="todo in items" >
               {{todo.message}}

           </li>
       </ul>
       <ul>
           <li v-for="(item,index) in items">
               {{parentMessage}}-{{index}}-{{item.message}}
           </li>
       </ul>
    </div>
    <!-- js -->
    <script>
        var demo = new Vue({
            el:"#demo",
            data:{
                parentMessage:'Parent',
                //对对象数组进行遍历
                items:[
                    {message:'apple'},
                    {message:'banana'}
                ]

            },
         
            
        })
    </script>
</body>
</html>